Evolution of collective N atom states in single photon superradiance

Details Evolution of collective N atom states in single photon superradiance Evolution of collective N atom states in single photon superradiance

2009-03-16

arxiv.org/abs/0903.2844v1

Physics

Optics

5 pages, 4 figures

Scientific paper

We present analytical solutions for the evolution of collective states of N atoms. On the one hand is a (timed) Dicke state prepared by absorption of a single photon and exhibiting superradiant decay. This is in strong contrast to evolution of a symmetric Dicke state which is trapped for large atomic clouds. We show that virtual processes yield a small effect on the evolution of the rapidly decaying timed Dicke state. However, they change the long time dynamics from exponential decay into a power-law behavior which can be observed experimentally. For trapped states virtual processes are much more important and provide new decay channels resulting in a slow decay of the otherwise trapped state.

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